Hyperthyroidism is more common in women, people with other thyroid problems, and those over 60 years old. Graves’ disease, an autoimmune disorder, is the most common cause. Other causes include thyroid nodules, thyroiditis, consuming too much iodine, and taking too much synthetic thyroid hormone.
The symptoms can vary from person to person. They may include
- Being nervous or irritable
- Mood swings
- Fatigue or muscle weakness
- Heat intolerance
- Trouble sleeping
- Hand tremors
- Rapid and irregular heartbeat
- Frequent bowel movements or diarrhea
- Weight loss
- Goiter, which is an enlarged thyroid that may cause the neck to look swollen
To diagnose hyperthyroidism, your doctor will do a physical exam, look at your symptoms, and do thyroid tests. Treatment is with medicines, radioiodine therapy, or thyroid surgery. No single treatment works for everyone.